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Related Experiment Videos

Prediction of post partum thyroid dysfunction: can it be improved?

J L Kuijpens1, V J Pop, H L Vader

  • 1Municipal Health Service, Southeast Brabant, Valkenswaard, The Netherlands.

European Journal of Endocrinology
|August 14, 1998
PubMed
Summary
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Screening pregnant women for thyroid peroxidase antibodies (TPOAb) can predict two-thirds of post-partum thyroid dysfunction (PPTD) cases. Testing TPOAb in the first trimester offers the best prediction, but combining it with other factors doesn't significantly improve results.

Area of Science:

  • Endocrinology
  • Reproductive Medicine
  • Immunology

Background:

  • Post-partum thyroid dysfunction (PPTD) screening in pregnant women using thyroid peroxidase antibodies (TPOAb) is debated due to low positive predictive value (ppv).
  • Identifying women at risk for PPTD is crucial for timely intervention and management.

Purpose of the Study:

  • To enhance the ppv of TPOAb testing for PPTD prediction.
  • To investigate if TPOAb testing timing or combination with other risk factors (smoking, family history, autoimmune diseases) improves PPTD prediction.

Main Methods:

  • Prospective study of 310 unselected pregnant women with serial TPOAb, TSH, and fT4 testing throughout pregnancy and post-partum.
  • Multivariate regression analysis to identify independent risk factors for PPTD.

Related Experiment Videos

  • ROC curve analysis to assess TPOAb sensitivity and specificity at different time points and concentrations.

    • Main Results:

    • The incidence of overt PPTD was 5.2%.
    • Independent risk factors for PPTD included TPOAb (RR=7.2), bottle feeding (RR=11.1), and smoking (RR=3.1).
    • TPOAb testing sensitivity was highest at 12 weeks gestation (0.67), with ppv ranging from 0.31-0.75, slightly increasing to 0.38-0.80 when combined with bottle feeding or smoking.

    Conclusions:

    • TPOAb testing can predict up to two-thirds of PPTD cases, with one-third remaining TPOAb-negative.
    • The first trimester is the optimal time for TPOAb testing.
    • Combining TPOAb testing with anamnestic determinants does not substantially increase the ppv for PPTD prediction.